因式分解,快,明天要交 (12 19:29:30)1.x^2(2y-1)x+y(y-1) _数学解答

因式分解,快,明天要交 (12 19:29:30)
1.x^2(2y-1)x+y(y-1) 2.a(x-y)^2-12a(x^2-y^2)+36a(x+y)^2

人气：226 ℃　时间：2020-04-15 13:01:51

解答

1.x^2(2y-1)x+y(y-1) 题是不是写错了
2.a(x-y)^2-12a(x^2-y^2)+36a(x+y)^2
=a[x^2+y^2-2xy-12x^2+12y^2+36x^2+36y^2+72xy]
=a[25x^2+49y^2+70xy]
=a(5x+7y)^2